If White attaches on top of the pincer stone with
here, two families of joseki can arise after the expected answer
. We can have
at a (tsukehiki) or at b (tsukenobi).
Although isn't one of the most common ways to play, there are many examples in pro games; and in particular the tsukenobi lines seem still to be developing and to lead to many complications such as running fights. These are some of the most unusual and difficult joseki for the 4-4 point.
is Black's other option in this position. No real josekis have been created yet for this position. I will show some game examples.
is a natural move. This game was played between Cho Chikun (Black) and Yoda Norimoto in the 1999 Meijin title match.
The opinion of the professionals was that this result was probably slightly better for White.
After and
, we get a position equivalent to tsukehiki followed by a solid connection. See tsukehiki for some possible follow-ups. Of course there are other options for
.
I will show this variation without comment. I do not know who played it, nor what comment was given, and I feel not capable of making it myself.
Charles Matthews Up to here follows a game Iwata Tatsuaki-Cho Chikun played 1992-07-02, in a context where Black had considerable strength in the upper right. But the continuation was different after that.
(no comment)